Question: excel addin Vista+Excel 2003

I am using windows vista but with office 2003. I am also using maple 11 with the 11.01 build. On installing maple excel addin I have this error: 'VBE6EXT.OLB' could not be loaded. Clicking OK gives another error: 'Unexpected Error (50001)' Now I can't even open the VB Editor. I get the error message: 'Out of Memory' Any help? Thanks.
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